The very idea of truth and science, Jonathan Rauch argues, is now under threat from many quarters. In his latest book, The Constitution of Knowledge, he gives a novel account of the principles of science, and explains why democracies must strive to preserve the truths that bind us together.

In this week's conversation, Yascha Mounk and Jonathan Rauch discuss the dangers of disinformation, the limits on robust debate, and why truth is fundamental to preserving democracies around the world.

This transcript has been condensed and lightly edited for clarity.

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